After a short while it was then possible to log in as root. From the logs it appears as though the machine was last booted in the year 2000 — or at least it thought that was the year! It was also possible to search the logs to see what the Ethernet address was when it was previously booted, which is useful as we could then go back to the OBP monitor and reprogram the IDPROM with this address. Of course, it is always possible that this wasn’t the original MAC address and it had been set to some random value when the original one had previously been lost.
// cryptographically secure random number generator.
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// 1. 建堆：从最后一个非叶子节点开始向上调整
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